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SubjectRe: [PATCH 4/6] mm: vmscan: Only update per-cpu thresholds for online CPU
On Wed, Jul 09, 2014 at 09:13:06AM +0100, Mel Gorman wrote:
> When kswapd is awake reclaiming, the per-cpu stat thresholds are
> lowered to get more accurate counts to avoid breaching watermarks. This
> threshold update iterates over all possible CPUs which is unnecessary.
> Only online CPUs need to be updated. If a new CPU is onlined,
> refresh_zone_stat_thresholds() will set the thresholds correctly.
> Signed-off-by: Mel Gorman <>

Acked-by: Johannes Weiner <>

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